Abstract
In this study, a symmetric polarization-division-multiplexing (PDM) wavelength-division-multiplexing passive optical network (WDM-PON) with fiber to the extension (FTTE) architecture is presented and investigated. The proposed PON can also avoid the Rayleigh backscattering (RB) interference noise. Here, each WDM wavelength can produce 25 Gbit/s on-off keying (OOK) and 10 Gbit/s OOK modulation channels simultaneously in x- and y-polarizations (Pol <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">x</sub> and Pol <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">y</sub> ) through PDM method for 25 and 105 km single-mode fiber (SMF) transmissions without dispersion compensation. The measured minimal power budget of 25 and 10 Gbit/s downstream and upstream signals are 29 and 35.1 dB and 29.8 and 31.5 dB, respectively, at the forward error correction (FEC) target. Therefore, the proposed PDM WDM-PON architecture can not only offer symmetric 35 Gbit/s downstream and upstream connections by the dual-polarized wavelength, but also can avoid the RB-induced interference noise. In addition, the presented dual-polarized downstream signal also can provide information security in physical layer, when the unauthorized user occupies unlawfully.
Highlights
Due to the immediate requirements of artificial intelligence (AI), 5G mobile, cloud computing, big data, internet, 4K/8K video service, and video conferencing for end user, developing the time-division-multiplexing (TDM) and wavelength-division-multiplexing (WDM) passive optical networks (PONs) have been proposed and studied to meet the desire in last mile access [1,2,3,4]
We present and demonstrate a symmetric PDM wavelength-division-multiplexing passive optical network (WDM-PON) architecture with fiber to the extension (FTTE) connection for long-reach fiber transmission
Through a length of single-mode fiber (SMF1), the WDM wavelengths could be separated by 2 N WDM demultiplexer at the remote node (RN)
Summary
Due to the immediate requirements of artificial intelligence (AI), 5G mobile, cloud computing, big data, internet, 4K/8K video service, and video conferencing for end user, developing the time-division-multiplexing (TDM) and wavelength-division-multiplexing (WDM) passive optical networks (PONs) have been proposed and studied to meet the desire in last mile access [1,2,3,4]. This way could cause the RB-induced noise in such network. While the same wavelengths are applied for downstream and upstream connections in the WDM-PON systems simultaneously, the RB-induced noise could be produced at the optical receiver (Rx) in the central office (CO) and the ONU [16, 17]. According to the PDM property, each WDM wavelength can be divided two orthogonal polarization (Polx and Poly) channels to carry 25 and 10 Gbit/s on-off keying (OOK) downstream traffic for 25 and 105 km single-mode fiber (SMF) transmissions, respectively, without any dispersion compensation. The presented PDM WDM-PON architecture offer symmetric 35 Gbit/s downstream and upstream transmissions by dual-polarized wavelength, and mitigate the RB noise and cause the data security and protection for end user
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